Brush



H. B. WHITE BRUSH Filed Jan. 24, 1929 Patented Oct. 6, 1931 UNITED STATES PATENT OFFICE HARRY B. WHITE, OF CANTON, OHIO, ASSIGNOR TO THE HOOVER COMPANY, A CORPORATION OF OHIO Bansn Application filed January 24, 1929. Serial No. 334,618;

has the desirable features of the wooden back 7 brush and the same ease of manufacturing has heretofore not been solved. In many applications of the brush the space occupied is very important and the use of the wooden 'brush has proven impossible because of its failure to provide the requisite strength. It is clear that metal back brushes can be made in smaller sizes with a greater strength than 'is possible in wooden backs but the problem of stapling bristles in said backs has proved a serious obstacle in the commercial advancement of such a brush. In a brush constructed in accordance with this invention a metallic back is possible. The method of stapling the bristles is simple and the ordinary sta pling machine can be adapted to perform the operation. The brush unit is composed of a minimum number of parts and is adapted to .be manufactured commercially in large quantities.

The principal object of this invention is, therefore, to provide a brush of a type that can be manufactured in small sizes yet which I has a back of strength and rigidity. A second object of this invention is to provide a metal back brush of light weight and simplicity which is adapted to be manufactured in large quantities. A still further object is 40 to provide a metal back brush which is easily assembled and is rigid and durable.

Referring to the drawings in which like reference characters refer to like parts throughout the several views Figure 1 is a view in perspective of a metal back for a brush constructed in accordance with this invention. 7

Figure 2 is a cross section through one of the tuft seats illustrating the first step of the stapling process with the bristle tuft inserted therein.

Figure 8 shows a second step of the operation started in Figure 2 with the staples driven to the bottom of the tuft seat.

Figure 4 illustrates the last step in the stapling of 'the brush in which the metallic flanges encompassing the staple are clamped firmly therearound.

Figure 5 is a view in perspective of a section of a completely assembled brush.

In Figure 1 a metallic brush back constructed in accordance with this invention is indicated generally by the reference character 1, and is formed of a single sheet of sheet metal doubled back upon itself. Diverging longitudinally-extending channel portions 22 at the bottom of the back having enclosed spaces 8-3 extend the entire length of the brush back and form the base thereof. Above the channels 2-2 the sheet metal sides converge at intermittent spaces 55 between which are formed openings 44 formed by the outwardly extending semi-cylindrical depressions or grooves in the metal sides lObetween the contacting I spaces 55. The reference characters 66 indicate the: depressions in the individual walls 10 of the base member. Upstanding lips 7 upon one of the walls are bent over the adjacent wall 10 and securely hold the back in its assembled relation.

Referring now to Figure 2 in particular, tufted bristles 8 are shown being inserted into the opening 4: which acts as the brush seat. A staple 9 precedes the tuft 8 in the opening 4 and the necessary force to the tuft and the stapleis exerted upon the top of the staple which, because the folded. tuft is threaded therethrough, necessarily draws the tuft in after it.

The next step of the stapling operation is illustrated in Figure 3 in which the tuft and staple are shown in their lowermost position in the brush back. The staple has been driven down in the brush back until it has contacted with the lower sides or faces of the channels 2-2 at which time it was spread into the position shown. The rigidity and strength of the channel portions 2-2 is suflicient to prevent distortion thereof through the driving contact of the staple 9.

The next and last step in the stapling process is shown in Figure at inwhich the operation shown in Figure 3 has been carried one stage further. After the staple 9 has been driven to its lowermost position in the bottom of the brush back a compressing force is exerted upon each of the channels 2-2 resulting in the elimination of the spaces 33 and the consequent forcing of the channel walls into intimate contact with the staples 9 securing said staples permanently therein. After the brush has been passed through this stage the finished product is present and is illustrated in Figure 5.

The various steps of the stapling process have been described for individual tufts and staples, but it is to be understood that the process encompasses the stapling of the entire brush back at one time if desired.

From the foregoing it is seen that a brush of unusual simplicity and strength which permits of assembling by a simple and economical method has been provided. The brush back being made of metal and being designed with angularly disposed members can be made of comparatively thin sheet material and still have strength and rigidity and resistance to bending moments throughout its length. The method of stapling the brush bristles is unusually simple and when completed provides a structure in which the working loose of the bristles is impossible.

I claim:

1. A brush comprising a metal back formed with tuft seats and longitudinally extending diverging hollow channel portions opening into said tuft seats, tufts of bristles seated in said tuft seats and staples connected with the tufts and extending into the channels for securing said tufts in place.

2. A brush comprising a metal back formed with tuft seats and longitudinally extending diverging hollow channel portions opening into said tuft seats, tufts of folded bristles seated into said tuft seats and securiug staples for said tufts threaded between the ends of the individual tufts and having their diverging ends firmly secured in said channel portions.

In a brush comprising a back formed of a strip of sheet metal folded upon itself throughout its length, hollow parallel channel portions extending the length of said brush, contacting faces on said back above Jan., A. D. 1929.

HARRY B. QVHITE. 

